對！查到：

Currently, tourists with U.S. passports do not need visas for short-term visits (up to three months).

Passengers who have been fully vaccinated and boosted with vaccines approved by the Japanese government and who are arriving in Japan after October 11, 2022, will not require a pre-travel COVID-19 test. 

所有跟帖： 

• 剛剛從日本回來，去之前做了人生第一次核酸檢測：） -dahaiyang- ♂ (45 bytes) () 03/09/2023 postreply 16:30:56

• 我打了兩針: JJanssen +Moderna,算不算fully vaccinated? 真不想再補針了。 -7妙記憶- ♀ (0 bytes) () 03/09/2023 postreply 16:46:32

• 我是說，日本海關隻認三針嗎？JJanssen 一針相當於兩針啊。 -7妙記憶- ♀ (0 bytes) () 03/09/2023 postreply 16:54:08

• 日本海關隻認三針,因為我隻打了兩針所以要做核酸 -dahaiyang- ♂ (0 bytes) () 03/09/2023 postreply 17:14:28

• 知道啦。補針或臨上飛機前一天做核算，我得選一樣：）） -7妙記憶- ♀ (0 bytes) () 03/09/2023 postreply 17:24:35

• 疫苗症不見了，有照片copy不知道是否算數。我今年秋季計劃去日本。 -香草仙子- ♀ (0 bytes) () 03/09/2023 postreply 18:27:54

• 72小時之內 -dahaiyang- ♂ (0 bytes) () 03/09/2023 postreply 16:34:13

• 三針才算full vaccinated. -7妙記憶- ♀ (0 bytes) () 03/09/2023 postreply 17:04:14

• 對 -dahaiyang- ♂ (0 bytes) () 03/09/2023 postreply 17:20:40